Process for dishing plates.



J. S. WORTH & G. B PAIRWEATHER.

' Y PROCESS FOR DISHING PLATES. APBLICATION IIVLED FEB. 19,1910.

Patented Dec. 5, 1911.

w afi s r i '1 WWW COLUMBIA PLANOGRAPH co., WASHINGTON. D. C.

UNITED STATES PATENT OFFICE.

JOHN S. WORTH AND CHARLES B. FAIRWEATHER, OF .COATESVILLE, PENNSYLVANIA,

ASSIGNORS TO JOHN S. WORTH AND WILLIAM P. WORTH, OF COATESVILLE, PENN- SYLVANIA.

PROCESS FOR DISI-IING PLATES.

1,011,000. s i i of L tt s t nt. Patented Dec. 5, 1911.

.. Application filed February 19, 1910. Serial No. 544,794.

To all whom it may concern:

Be it known that we, JOHN S. WORTH and CHARLES B. FAIRWEATHER, citizens of the United States, residing in Coatesville, Pennsylvania, have invented certain Improvements in the Process of Dishing Plates, of which the following is a specification.

Our invention relates to certain improvements in the process of dishing metal plates in which a former and a series of rollers are used, the rollers pressing the plate to be dished into the former.

The object of our invention is to so dish the plate as to prevent buckling of the edges, also preventing the plate from being drawn out unevenly, which produces thin spots.

Our invention is an improvement in the process as fully set forth and described in the application for patent filed by John S. Worth, May 20th, 1908, under Serial No. 433,866.

In the accompanying drawings :Figure 1, is a view showing the first step in the process; Fig. 2, is aview showing the second step in the process; and Fig. 3, is a view showing the third step in the process. In this view the plate is completely dished.

A is a former which is rotated in any suitable manner and having an internal shape of the final form of the plate to be dished. This former has a flange a with a beveled sur-,

face a. V,

B is a central forming plunger having a head B free to turn thereon, and on the plunger is a frame B having bearings for two rollers C, C, one on each side, as illustrated in Fig. 3; andD is a plunger adapted to pass through the center of the former A to resist the pressure of the plunger B.

E, E are swiveled rolls mounted independently of the rollers G, G and the head B and so situated as to roll in a path beyond the rollers C, C. s

F, F are vertically arranged rollers adapted to bear against the edge of the plate during the final step of the process, and I, I are conical rollers arranged to travel on the beveled surface a of the flange a of the former A, and these rollers have a movement toward the center of rotation so as to Fig. l, and then placed on the flange a of these rolls is mounted in a swiveled bearing they accommodate themselves to the plate as it is being dished, as illustrated in Fig. 2. As the dish is being formed in the plate, the plate is contracted in diameter and the rollers I are forced in against the flange, traveling down the inclined surface a, as illustrated in Fig. 2. This prevents the flange or the edge of the plate buckling as the plate is being forced into the former. As the process is continued the rollers C, C bend the plate between the central head'B and the line of the rollers E, and after the flange m of theplate disappears, as in Fig. 3, then the beveled rollers I are out of action and the rollers F, which are mounted on vertical axes, press the edge of the plate against the former, rolling out any buckles or slight undulations'that may occur in the plate. After the plate has been pressed against the surface of the former at all points the rollers and head B are withdrawn and the plate removed, either by lifting it out of the former or by forcing it out by the plunger D, or by any other means. The plate may be dished in a single heat or two heats may be required to properly dish it, depending considerably upon the size of the plate and its thickness, and the amount and depth of dish required. 7 B

By our improved process, we have dished some very large plates with practically no buckling, and with comparatively little'variation in the thickness of the plate.

We claim 1. The process hereindescribed of dishing metal plates, said process consisting in flanging the plate, then exerting a continued pressure against the exterior surface of the flange simultaneously with the dishing of the plate, the pressure being continued as the flanged portion of the plate is reduced in diameter due to the dishing until the flange disappears and the plate is dished to the form desired.

2. The process herein described of dishing metal plates, said process consisting in.

flanging a plate, rolling and pressing the In testimony whereof, we have signed our exterior surface of the flange simultaneously names to this specification, in the presence 10 with the dishing of the plate until the flange of two subscribing witnesses.

disappears and the plate assumes the dish JOHN S. WORTH.

desired, and finally rolling the internal sur- CHARLES B. FAIRWEATHER. face of the plate near the edge siinultane- Witnesses:

ously with the final rolling of the dished BESSIE W. COOK,

portion of the plate. WILLIAM S. G. 000K.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

